SOLUTION: A and B are independent events. P(A) =0.3, and P(A or B) = 0.8. Find P(B)

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Question 951296: A and B are independent events. P(A) =0.3, and P(A or B) = 0.8. Find P(B)
Answer by Techpriest(29) About Me  (Show Source):
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P(A or B) = P(A) + P(B)
0.8 = 0.3 + P(B)
0.5 = P(B)